Sennheiser MB Pro 1 (506041) - Single-Sided, Wireless Bluetooth Headset | For Mobile Phone Connection | w/ HD Sound & Noise Cancelling Microphone (Black) Mobile Device Connection: For those who simply need an excellent hands-free communication solution in the office, in the car, and outdoors via cell phone Flexibility: Switch seamlessly between two connected Bluetooth cell phone devices for premium call flexibility HD Sound: Powered by a neodymium speaker for legendary Sennheiser HD sound to ensure a clearer and more natural audio experience Ultra-Noise Cancelling Technology: Filters out all unwanted background noise for crystal-clear conversations All-Day Use: Designed to last an entire working day, featuring extra soft leatherette ear pads and headband padding for maximum wearing comfort Extended Talk-time: With up to 15 hours of talk time, you can always stay worry-free focused on your conversations Peace of Mind: With a 2-year warranty on all headsets (including batteries), you never have to worry about the quality of your bluetooth headset Sound Enhancement Profiles: Automatically adapts and optimizes sound for both communication and multimedia/music purposes ActiveGard Technology: Ensures protection against acoustic injury caused by sudden sound bursts on the line